Blackstar

Blackstar is a 1981 US-American cartoon from Filmation Studos. The series was originally broadcasted over CBS between 12 September and 5 December 1981.

Plot
John Blackstar is an astronaut from Earth. When in his spacecraft, it is is swept through a black hole and crashes onto the planet of Sagar. There, he asssists the Trobbits in the fight against the Overlord, for the Powersword and Starsword.